class_docstr: *MUSAN* :cite:`musan2015` dataset.
  
  Args:
      root (str or Path): Root directory where the dataset's top-level directory exists.
      subset (str): Subset of the dataset to use. Options: [``"music"``, ``"noise"``, ``"speech"``].
docstr: Get metadata for the n-th sample in the dataset. Returns filepath instead of waveform,
  but otherwise returns the same fields as :py:func:`__getitem__`.
  
  Args:
      n (int): Index of sample to be loaded.
  
  Returns:
      (str, int, str):
          str
              Path to audio.
          int
              Sample rate.
          str
              File name.
docstr_tok: ["Get","metadata","for","the","n-th","sample","in","the","dataset",".","Returns","filepath","instead","of","waveform",",","but","otherwise","returns","the","same","fields","as",":","py",":","func",":","`","__getitem__","`",".","Args",":","n","(","int",")",":","Index","of","sample","to","be","loaded",".","Returns",":","(","str",",","int",",","str",")",":","str","Path","to","audio",".","int","Sample","rate",".","str","File","name","."]
code: def get_metadata(self, n: int) -> Tuple[str, int, str]:
      r"""Get metadata for the n-th sample in the dataset. Returns filepath instead of waveform,
      but otherwise returns the same fields as :py:func:`__getitem__`.
  
      Args:
          n (int): Index of sample to be loaded.
  
      Returns:
          (str, int, str):
              str
                  Path to audio.
              int
                  Sample rate.
              str
                  File name.
      """
      audio_path = self._walker[n]
      return audio_path, _SAMPLE_RATE, Path(audio_path).name
  
file_path: audio/src/torchaudio/prototype/datasets/musan.py
imports: from pathlib import Path
  from typing import Tuple, Union
  import torch
  from torch.utils.data import Dataset
  from torchaudio.datasets.utils import _load_waveform
label_desc: Use image node_id 2 for calling the Musan obj's underlying member method code with example usage: obj.get_metadata(n) and returns: audio_path,  _SAMPLE_RATE,  Path